Worked on observability improvements in the Altinity/ClickHouse repository, focusing on enhancing operational clarity for replica recheck events. Implemented a targeted change in StorageReplicatedMergeTree.cpp by downgrading the log level for messages about replica part appearance from INFO to DEBUG, thereby reducing unnecessary log noise without altering system behavior. This adjustment improved the monitoring signal-to-noise ratio and facilitated easier incident triage for operators. The work involved C++ code modifications, careful log level tuning, and collaboration through code review processes. No critical bugs were addressed during this period, with efforts concentrated on maintainable, incremental improvements to database internals and logging practices.